Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Current Electricity

Question:

Calculate the resistivity of the material of a wire 1.0 m long, 0.4 mm in diameter and having a resistance of 2.0 Ohm.

Options:

2.1 x 10-5 Ohm meter

2.1 x 10-5 Ohm

2.1 x 10-7 Ohm meter

2.1 x 10-7 Ohm 

Correct Answer:

2.1 x 10-7 Ohm meter

Explanation:

Resistivity : ρ = R \(\frac{A}{l}\)